Electric brake for graphophones.



JL F. MEANS. ELEGTBIG RAKB FOR GRAPHOPHONES.

' ArPLIoA'HoN FILED APB.. 1 0, 1911.

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@www5 'n70-?? Z ./Vawa TL @im y dew/nlm J. P. MEANS.- ELECTRIC` BRAKE POB GBAPHQPHONES. APPLIUATIOH FILED APB. 10l 1911.

2 SHEETS-BHEBT 2.

UNITED sfrarnserawrnur OFFICE.

.JOHN F. MEANS, F OIL CITY, PENNSYLVANIA.

ELECTRIC BRAKE FOR GRAPHOPHONES. Y

To all whom it may concern.:

.Beit known that I; JOHN F. Metas, e

' citizen of the United States, `residing at Oil "Fig, 3 with. the parts in retracted position;` ..Fig. 5 a similar view with the brake 1n 4o. j `tion with the casing removed; Fig. 7 is an f phone.

vmounted thereon is a turn table 2 on which City; in the county of Venango and State of Pennsylvania, have invented certain new and useful Improvements in Electric Brakes Afor Graphophones; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.,

j This invention relates to improvements in electricybrakesfor graphophones. The' principal object of the invention is rto-provide an improved construction of scribed and particularly pointed out in the appended claim. l

In the accompanying drawings: Figure 1p1-is a `plan view of a disk graphophone showing the application of this invention;

Fig. 2 is a vertical section taken on the line j '2-2 of Fig. 1; Fig. 3 is a plan view partly in section on an enlarged scale, of the magnet and brake releasing mechanism; Fig. l 1s a vertical section taken on line 4-4 of operative position; Figr is a front elevaend elevation thereof; Fig. S is a detail cross sectional view through the horn showing the mountingofthe contact carried thereby.

4In the vembodiment illustrated, a cabinet 1 is shown in which is arranged `the motor and operating mechanism of ther grapho- Above the! cabinet and revolubly the record disks are arranged and operated.

'A horn supporting bracket 3 is preferably secured to one -side of the cabinet and a soundl transmitting horn 4- is pivotally Specification of Letters Patent. v Application Bled April 10, 1911. Serial No. 6205954. l

' Patented sept. 26, 1911.

y mounted in the upper end of said bracket.

This horn 4 carries the reproducer 5 havingV a record engaging needle 6.

The parts above described may be of the .usual or any desired construction and form 'no part of thepresent invention.

This improved brake mechanism comprises' a brake cylinder 7 mounted in any suitable position on the cabinet adjacent to the edge of the turn table 2. A brake piston or plunger 8 is slidably mounted in the cyli inder 7 carrying at its outer end a brake shoe 9 which is adapted to be forced into e11- agement with the edge of the turn table for the purpose of stopping said table. This plunger or piston 8 is projected and held in operative position by a coiled spring 10 arranged around the rod or stem 11 of the piston within the casing as is shown clearly in Fig. 1. The outer end of the rod or stem 11 extends through and projects beyond the -end of the cylinder 7 and has a notch 12 formed therein which when the plunger is in a retracted or inoperative position is adapted to be engaged by a suitable catch which holds the plunger in inoperative position. A pin 13 preferably extends at right angles from the stem l1 and projects through a longitudinally extending slot 7 in the cylinder 47 thc wall`at the front end j of the slot serving to limit the forward movement of the plunger and the engagement of the pin 13 with the side walls of the slot prevents rotation of the plunger.

This pin 13 in connection with a lever 14e` operates to retract the plunger when desired. This lever 14e is preferably rin the form of a bell-crank fulcrumed to the cyl- I inder 7 with one arm extended in position to engage the pin 13 when the other arm thereof is depressed. A spring 15 is mount-l ed -on the pintle of and engages the lever let to throw said lever back out of the way to permit the plunger to move forward-with-A out interruption when the stem thereof has been released vandfurther forming a` yielding stop-for the pin ywhen the rod is released, as will be hereinafter more fully described.

The catch herein shown for holding the plunger 8in retracted positionv comprises a linger 16 which projects at right angles from an armature 17 which is held in place by a spring 18 iny position to 4be operated by an electromagnet 19 which is arranged gli t7op of the cabinet adjacent the cylin- .er l

On the cabinet adjacent the outer end of the plunger rod 11 is a circuit breaker 20, one member of which is in electrical connection with one pole of the magnet 19 by a suitable conducting wire 21 while the other member of said circuit is in electrical connection with a suitable battery 22 by a circuit conducting wire 23. The battery 22" may be arranged in any suitable position'but is shown secured to the side of the cabinet 1. With the other pole of the mag-- net is connected a current conducting wire 2T which runs to a contactl switch hereinafter described. The other terminal oi' j said switch is connected to the battery 22 by a current conducting wire 28. When the brake plunger rod 11 is retracted to an inoperative position and the notch 12 thereof engaged by the stop finger 16, the outer end of said plunger will engage the circuit breaker and close it. The magnet 19 and the brake mechanism are inclosed in a suitable protective casing 33,;having an opening 34 in one wall thereof through which the end ofthe lever M pro@ jects in posit-ion to be depressed by the operatr for withdrawing the brake into inoperative position.

The circuit closing switch for the electro' magnet asfhere shown preferably consists of4 a bracket 29, secured to the top of the cabi- 'net 1 on which is fulcrumed a bell crank lever 30, the terminal of the current conducting wire 28 being connected with said bracket 29. The other terminal of l the switch is in the form "of a metal band 31 which encircles the horn 4 and has a contact f. point 32 secured between the ends of said withthe turn table thereby stopping band 31, and with which is connected the "terminal of the current conducting wire 27 incense the outer endof thejplunger rod 11 be disengagedv from the circuit breaker,

allowing the members thereof to again break `the circuit to the magn By the use of this improved brake and switch fmechanism, it will be readily seen that themachine may be stopped at any desired place on the record.' y

l/Vhile the brake and its operating mechanism has been herein shown as applied to a disk record machine, it will be understood that this application is simply shownfor and the minor details of construction may be resorted to without departing from the principle or sacrificing any of theadvantages of the invent-ion as defined inthe appended claim.

I claimas my invention:

A structure of the class described comprising a cabinet having a revoluble member thereon, a brake cylinder secured to said cabinet, a spring actuated plunger mounted in said cylinder and having a brake shoe adapted to contact with said revoluble member when in projectedv posi'- tion, a projection on said plunger projecting through and guided by a slot in the brake cylinder, a bell crank lever arranged to engage said projection above the latter for retracting said plunger, a spring for normally holding said lever out of. the path of said projection and forming a yielding stop for t-he latter when released, an armature arranged adjacent said brake cylinder and having a laterally extending finger for engagement with said plunger, magnets kfor actuating said armature, and a source of energy for energizingysaid magnets.

In testimony whereof I have hereunto -set my hand in presence of two subscribing witnesses.

JOHN F. MEANS. lVit-nesses ABEL L. CONFER,

Louis H. KISTLER. 

